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| Illustration 1 | g01394456 |
Hydraulic schematic for the steering and braking system (1) Left steering cylinder (2) Right steering cylinder (3) Brake release cylinder (4) Front wheel brakes (5) Steering control valve (6) Steering release diverter valve (7) Pressure tap for the brake release system (8) Line relief and make-up valve (9) Line relief and make-up valve (10) Shuttle valve (11) Spool (12) Check valve (13) Brake release sequence valve (14) Connection for recovery hook type brake release system (15) Shuttle valve (16) Steering relief valve (17) Parking brake oil pressure switch - electronic transmission control (18) Parking brake oil pressure switch - remote control light (19) Check valve (20) Steering system pressure tap (21) Steering pilot control valve (22) Implement and steering neutralizer valve (23) Pressure tap for the parking brake and the pilot system (24) Check valve (25) Service brake pedal (26) Service brake and transmission neutralizer pedal (27) Secondary steering diverter valve (if equipped) (28) Hydraulic oil cooler (29) Rear brake accumulator (30) Front brake accumulator (31) Primary steering flow switch (if equipped) (32) Left neutralizer valve (33) Right neutralizer valve (34) Residual brake oil pressure switch (35) Pressure tap for the steering pilot system (36) Parking brake control valve (37) Residual brake oil pressure switch (38) Rear wheel brakes (39) Service brake control valve (40) Secondary steering pump (if equipped) (41) Steering pilot pressure reducing valve (42) Line from the implement lift circuit (43) Selector and pressure control valve (44) Brake accumulator oil pressure switch - alert indicator (45) Brake accumulator oil pressure switch - brake application (46) Hydraulic tank (47) Pilot oil pressure reducing valve (48) Breaker relief valve (49) Portable hydraulic pump quick connect coupler (50) Pilot and braking pump (51) Steering pump (52) Implement pump (53) Hydraulic oil filters (54) Portable hydraulic pump quick connect coupler (55) Check valve (56) Brake accumulator charging valve (57) Pressure tap for brake accumulator charging system | |
Note: Illustration 1 shows a machine with the steering and brake release system. Machines without the optional brake release system will not have check valve (12), pressure tap for the brake release system (7), brake release sequence valve (13), brake release cylinder (3) and shuttle valve (10).
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| Illustration 2 | g01394925 |
Location of the braking system components (3) Brake release cylinder (4) Front wheel brakes (25) Service brake pedal (26) Service brake and transmission neutralizer pedal (29) Rear brake accumulator (30) Front brake accumulator (36) Parking brake control valve (38) Rear wheel brakes (39) Service brake control valve (46) Hydraulic tank (47) Pilot oil pressure reducing valve (48) Breaker relief valve (50) Pilot and braking pump (56) Brake accumulator charging valve | |
The braking system has two brake control circuits operating four wheel brakes on the machine. The service brake circuit and the parking brake circuit.
The main components of the service brake circuit are: hydraulic tank (46), pilot and braking pump (50), check valve (55), brake accumulator charging valve (56), rear brake accumulator (29), front brake accumulator (30), service brake and transmission neutralizer pedal (26), service brake pedal (25), service brake control valve (39), front wheel brakes (4), rear wheel brakes (38) and various lines.
The main components of the hydraulic parking brake section are: hydraulic tank (46), pilot and braking pump (50), check valve (55), pilot oil pressure reducing valve (47), parking brake control valve (36), front wheel brakes (4), rear wheel brakes (38) and various lines.
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| Illustration 3 | g01394930 |
(46) Hydraulic tank (behind guard) (58) Filler cap | |
Hydraulic tank (46) is located in the middle of the right side of the machine behind the hydraulic tank guard. Additional oil is placed into the tank through filler cap (58).
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| Illustration 4 | g01394931 |
(46) Hydraulic tank (48) Breaker relief valve | |
Breaker relief valve (48) is located on hydraulic tank (46).
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| Illustration 5 | g01395329 |
(50) Pilot and braking pump (51) Steering pump (52) Implement pump | |
Pilot and braking pump (50) is part of a three section, vane type pump mounted on the torque converter updrive housing.
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| Illustration 6 | g01395331 |
(56) Brake accumulator charging valve | |
Brake accumulator charging valve (56) is located on the left side of the rear frame.
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| Illustration 7 | g01395332 |
(29) Rear brake accumulator (30) Front brake accumulator | |
Front brake accumulator (30) and rear brake accumulator (29) are located on the left side of the rear frame.
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| Illustration 8 | g01395333 |
(25) Service brake pedal (26) Service brake and transmission neutralizer pedal (39) Service brake control valve (under floor) | |
Service brake pedal (25) and service brake and transmission neutralizer pedal (26) are located on the floor of the operator station. Service brake control valve (39) is located under the floor of the operator station.
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| Illustration 9 | g01395335 |
(47) Pilot oil pressure reducing valve | |
Pilot oil pressure reducing valve (47) is located on the left side of the rear frame.
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| Illustration 10 | g01395334 |
(36) Parking brake control valve | |
Parking brake control valve (36) is located on the left side of the rear frame.